Stop mechanism.



0. ASHTON.

STOP MEOHANISM. l PPLIOATION rILBD Nov. so, 190s.

1,026,067. Patented May 14,51912. I

MMT/WUR?.

' UNITED STATES PATENT oEEIoE.

ORRELL ASHTON, 0F LARENCE, MASSACHUSETTS, ASSIGNOR TO 'UNITED SHOEMACHINERY COMPANYDF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

i ,ofaeoot STOP IIVITILCIHANISM.

Application filed yNovember 30, 1306. Serial No. 465,076.

@HaHa-'hom 'iimag/ concern: l

Be it. known that l,()mn-:LL Asn'ron, a citizen of the United States.residing atl llyawrence, in the county ot' Essex and Cour monwealth ofl)lassacht|setts. have invented certain improvements in Stop Mechanism,

of which the followingr description` in con-i nection with theaccompanying drauings,is

.a specification, like ret'erence characters on Ithe drawingsindicalmzglr like parts tn the severa l tigures. i

In the drawings, Figure l is a view in` side elevation with parts invertical section' of stop mechanism constitutin r one embodiment of theinvention, showing;r also a portion of a machine to which said mechanismis applied; Fig. is a perspective view showing in detail a portion ofthe mechanism of Fig. 1.

Referring. tothe drawings; the reference numeral 3 indicates a shaftactuated by the mechanism to be described. The haft 3 is provided with alongitudinal groo've in which is received a member 70.- he mema slot inwhich is received a collar 72. A driving pulley 74. is mounted upon thecollar 72 to rotate freely thereon, but is restrained frommovementlongitudinally thereof. A member 76 is mounted upon the shaft 3in fixed relation thereto and is provided with a conical frictionsurface engaged by a similarly shaped surface upon the interior of rthepulley 74. The construction is such that the pulley 74 moveslongitudinally with the member 70, safid member being pressed toward themember 76 by a s ring 78 eneirelingthe shaft 3. A flange `sleeve. 79 isarranged between the 'spring 78 and the i her 7() is providedintermediate its ends with member 70, the outer end of t1 e spring en`raging a washer 8 1 held from o Atward movement. by a bolt. 83 insertedin t e end of the -shaft. A lever 80 is pivotally mounted upon abearingr encircling the Shaft' 3, Said lever being provided Iatits lowerend with a guideway for a slide 82. connected to a' treadle (not.shown). The patb of the slide 82 is in line with the inner end of themember 70 and said slide is provided at its upper end with au inclinedor cam face 8i arranged to be engaged by the" end of the member 70 inthe rotation of the shaft Si. lsaid member beinfh'A tius forcedlongitudinally of the shaft la'gttitirst the resistance of the. spring78 to releasel tlieieluteh. The sli -e 9; provided upon its rear portionwith a stop surface 86 which is engaged by the member 70 at the end of arevolution of the shaft il and serves to positively arrest. said shaft.wThe. lever 80 is arranged fora limited movement upon its support. saidmovement being limited by a stationary stud 88 secured to the frame ot'the machine and arranged within a forked portion of the lever. Aspring-pressed plug' 90 engaging the stud 88 is arranged upon the leverSO to resist yieldingrly rearward movement of thenpper end of the lever.

'Io prevent. rebound of the .shaft 3 at the end of a revolution. a. pawl92, pivoted at 93. is arranged in the path of the member 70 and is heldyieldingly against a stop ,surface 94 by a spring-pressed plunger ,96. ilt will be seen that while thel pawl 5)*2 does not interfere with the niovement of the shaft. il

in a left-handed direction, viewing Fig. 2, it prevents movement of,said shaft in the reverse direction after the member 70 strikes thesurface Bti upon thev slide 82 at the end ofa revolution.

In the use of the mechanism shown, the clutch is brought into operationto impart movement to the shaft 3 by depressingr the slide S2. ln thismovement of the slide it removed from engagement with the end of themember 70, allowingdhe latter to he. moved to the left. in Fig. l bymeans of the spring l78. The friction surfaces upon the pulley 74 andthe." fixed member 76 are thas brought into engagement and the shaft 8ythereby placed in rotation. As will be obvious. this rotatory movementof the sha t` t 3 continues as long' as the slide 89. remains depressed.Vhen the slide 82 is allowed to rise, theinclined surface S4 upon itsupper end is engaged bythe member 70 and saidmember is thereby forced tothe right 'Lin Fig. 1, removingr the pu ley 74 from fric-4tional"emragement with t e fixed member The momentum of the drivenparts causes further movement, .of the shaft 3 until the member 70.comes in contact with rie 'the stop surface 86 uponl the slide 82. It

the machine.y The Amovement of the shaft 3 is thus yieldingly arrestedat the end of a revolution. After the momentum of the driven parts hasbeen cheeked by the stationary stud 88 the lever 8O is returned to itsnormalr position b y the reaction of the spring-pressed plug 90. Thiscauses' a slight rearward yturning movement or rebound of the shaft 3.This'rebound is restricted to a small amount by the pawl 94 vvvith whichthe 'member 70 has engagement and which is arranged to prevent movementin a rearward direction` of the shaft 3. Vlas will be obvious the impactof the member 7 0 upon the pawl 92 in the rebound is resisted throughthe lever .80 by the stationary stud 88.4

Having described my invention, vvhat claim as new and desire tosecuregby Letters Patent of the United States isz- 1. The combinationwith a driven member held from turning movement upon a shaft, of adriving member, means for holding said driving member yieldingly in ifrictional engagement with the driven member, a longitudinal memberconnected to the driving member and extending through said drivenVmember in a direction parallel tothe shaft, a movable cam arranged tobe brought into the path of said longitudinal member to,force thedriving member out of engagement With the driven member and a stop'arranged to be brought into the,'pathV of the longitudinal membersimultaneously with the cam tov arrest the motion of the driven 'iparts.

Q. Tlle combination with a driven member held from turning movement upona shaft, of a driving member. means forr holding k'said driving memberyieldingly in frictioiialengagement With the driven member, alongitudinal member connected to the driving member and extendingthrough said driven member in a direction' parallel to the shaft, aslide arranged for movement transverse to the driven shaft. providedwith a cam surface arranged foi' engagement with one.

end of the longitudipal member for forcing the driving member ut [ofengagement with the driven member and with a stop surface arranged toarrest the motion of the driven parts by vengagement with thelongitudinal memben'and means for sustaining the slideAyieldinglyagainst the impact of the longi- 4tudinal member.

3. The combination with a' driven member held from turning movement upona shaft', of a driving member, means for holding said driving member infriclional engagement with the driven member, a longitudinal memberconnected to the driving member extending through said driven member andarranged for sliding movement in a groove formed in the shaft, and'adevice arranged formovement intol and out'of the path of saidlongitudinal member provided with a cam surface for forcing saidlongitudinal member into. an inoperative posit'ion whereln the dr1vmmember is out of' engagement with the driven member. and with astopsurface arranged for' engagement with the longitudinal member forarresting the motion of the driven parts.

4. The combination with a driven member held from turning movement upona shaft, of a driving member, means for hold- -ing said driving memberyieldiugly in engagement-with the driven member, a lever vmounted for alimited amount of turning movement about an axis parallel with the axisof the shaft, means for holding said lever yieldingly from'movement inthe direction of vmovement of the driving member, and aslide arrangedfor movement upon said lever transverse to the shaft provided with a camsurface for forcing the driving member out of engagement with the drivenv member and with a stop'surface for arresting movement of the drivenparts.

5. The'combinatlon with a driven mem- 4ber heldfrom turning movementupon 'a shaft, of adriving member, means for holding said driving memberyieldingly in engagement with the driven member, a lever mounted' for alimited amount of turning movement about an axis parallel with the axisofthe' shaft, means for holdingr said lever yieldingly from movement inthe direction of movement of the driving member, a slide arranged formovement upon said lever transverse to the shaft provided with a camsurface for forcing the driving inember out of engagement with thedriven member and with a stop surface for arresting movement-of thedriven parts and a paw] mountedi, upon aid lever for checking the`rebound of the driven 'member'.

In testimony twhereof I havesigned my `name to this specificationin thepresence of

